# CVE-2026-74871

## Summary

- **CVE ID:** CVE-2026-74871
- **Severity:** MEDIUM
- **CVSS Score:** 6.9 (CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N)
- **CWE:** CWE-916
- **Published:** Aug 17, 2026
- **Last Modified:** Aug 17, 2026

## Description

openssl_encrypt versions before 1.4.6 contain a key derivation flaw in sequential XOR composition mode where the last stage cancels out during key generation. When configured with a single KDF and no prior hashing stage, attackers can bypass memory-hard key derivation and perform offline password cracking at SHA-256 speed instead of the configured KDF cost.

## Affected Products

- jahlives — openssl_encrypt (0)
- jahlives — openssl_encrypt (1.4.6)

## References

- [CNA](https://github.com/jahlives/openssl_encrypt/security/advisories/GHSA-vxf9-vwp6-2w43)
- [CNA](https://www.vulncheck.com/advisories/openssl-encrypt-before-kdf-bypass-via-sequential-xor)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.09%
- **EPSS Percentile:** 0.6

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._